– This version has been provided by an anonymous source.
– The date on the tape is 09/12/69 but it is almost certainly 1968. *

The tapers section at dead.net for the w.e. 23 September says:

Going back a few years, we are pleased to play a couple of jams from 9/21/68. This material is drawn from a very interesting tape, in that it features Phil, Jerry and Mickey, plus a couple of guest musicians, in a studio jam right in the midst of the period in which the Mickey and the Hartbeats shows were being performed without Bobby and Pigpen. From this studio session, we have a nice Clementine Jam and another very interesting Jam.

Unfortunately the link is dead so we can’t compare it at this time.

– After the jam Garcia says “Was it wierd, did you like it?”
– All files are tagged.